Fuse for projectiles



March 4, 1930. G. E. ROGERS FUSE FOR PROJECTILES Filed May 22, 1929 Patented Mar. e, ieee GILBERT E. ROGERS, OF ROCKAWAY, NEW JERSEY FUSE FOR PROJECTILES Application filed May 22,

1929. Serial No. 365,204.

(GRANTED UNDER THE .ACT F MARCH 3, 1883, AS AMENDED APRIL 30, 1928; 370 0. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royaltv thereon.

' The subject ot this invention is a inse for projectiles, particularly designed as an improvement on that type of fuse whose distinguishing characteristic is a completely af*- sembled plunger unitcarrying a bore sat'e `tiring pin.

The principal objectoi this invention is to provide a plunger ot the type specified which is especially applicable to a combination point detonating and percussion fuse.

lith the foregoing and other objects in view, the invention resides in the novel arrangement and combination of parts and in the details ot construction hereinafter described and claimed, it being understood that changes in the precise embodiment ot the invention herein disclosed may be made within the scope of what is claimed without de parting` from the spirit of the invention.` 1

A. practical embodimentot the invention is illustrated in the accompanying drawing,

wherein:

Fig. 1 is a longitudinal sectional view of a fuse constructed in accordance with the invention showing the parts adjusted for instantaneous action;

Fig. 2 is a fragmentary, longitudinal sectional view showing the parts in position for delay action liring;

Fig. 8 is a. sectional view ot the plunger' r unit taken at right angles to `Fig. 1. Referring to the drawing by characters ot' reference o There is shown a fuse casing 5 in which is mounted an axial impact striker 6 capable otl being inoperated by any means not illustrated since the same is old and well-known inl the art, but otherwise operable on impact to function a detonator 7 which is so mounted 4511i a movable carrier 8 that it may be positioned to communicate with a booster charge 9. in the rear of the casino. A spring 10, coniined between the fixed part of the casing and a collar 11 on the striker, restores the striker 50.. to the armed position when the torce ot setback has' ceased and maintains it in this position against air pressure during flight.

Mounted in a cavity 12 in the 'inse casing, directly in iront ot the adaptor 13 carrying the detonator and booster, is a plunger unit consisting of a telescopically arranged percussion plunger 14 and guide 15. I he guide is in the form of a bushing partially inserted in a central aperture 16 in the plunger and provided with an annular flange 17 whose margin is engaged when the guide is extended by a spring 18 by the inturned rim 19 or" a sheath 2O encasing the plunger.

The two members of the plunger unit are positively locked in the extended position by means of centrifugally releasable bolts Q1 arranged oppositely in the plunger and normally projected by their springs 22 into the central aperture 16 where they are in position to oppose inward movement of the guide 15. rhe bolts when in the normal position contact the reduced portion 23 of the striker which must pass through the guide and plunger in order to reach the detonator.

The percussion plunger 14 carries a nona-Xial delay explosive train 24 which is in communication through an inclined lla-sh passage 25 with the detonator 8. A tiring pin 26, iiXed in the fuse casing forwardly of the plunger unit, projects through an aperture 27 in the flange 17 ot the guide and has its point disposed in a guide passage Q8 in the plunger to insure alignment with the eX- plosive train by preventing rotary movement of the plunger unit during the forward displacementof the plunger resulting from retardation of the project-ile. `Relative ro tary movement oic the plunger and guide is .further prevented by a lug 29 on the flange of the guide member fitted` into a groove 3() in the plunger. t

lVhen the striker is adjusted for operation. as in Fig. 1, it will move rearwardly on setback, exerting a pressure on the guidev member which, in turn, is transmitted to the bolts 21 to increase their resistance to the action ot centrifugal force until the force of setback has abated.

When inserting the assembled plunger unit into the cavity, it receives the fixed firing pin' 26 and the portion 23 of the striker Which is of suliicient length to be introduced between the bolts 2l even when the striker is in its inoperativev position, as shown in Fig. 2.

The plunger unit,after being placed in the cavity, is iirml-y held against the floor thereoic by a disc 3l Which is assembled with the adaptor 13.

I claim: Y

l. In a combination fuse, a fuse casing formed with a cavity, an adaptor closing the cavity, a detonator in the adaptor, a plunger unit in the cavity including a percussion plunger and ay guide member cooperating to limit their extension, Ya spring between the percussion plunger and guide member, .centrifugally releasable bolts carried by the plunger' for' holding the percussion plunger and guide in extended position, a delayV explosive trai-ii eccentrically carried by the percussionplunger, an axially mountedstriker in the fuse casing'pass'ing centrally through the plunger unit and a iing pin lixed in the fuse casing in line With the delay explosive train..` v Y 2. In a combination fuse, a fuse, easing formed' With a cavity, a plunger unit in the cavity including a percussion plunger and a f guide member cooperating to limit their extension, a spring between the percussion plunger and guide member, centrifugally releasable bolts carried by the plunger for h0ld ing .the percussion plunger and guide in extended position, a delay explosive train eccentrieallycarried by the percussion plunger, an axially mounted striker in the fuseV casing passingA centrally through the plunger unit and a firing pin fixed in the fuse casing in line with the delay explosive train.

3;. In a combination formed Witha cavity, a plunger unit in the cavity including a percussion plunger and a guide member cooperating to'limit their extension', a spring between the percussion plunger and guide member, centriiugallyre-V leasable boltsfor holding the percussion Vplunger and guide in extended position, a delay explosivetra-in eccentrically carried bythe pereussio'n'plungen an axially mounty ed: strikerv in the fuse 'casingpassingV central-- ly-through the plunger unit and a firing pin fixed in the fuse casing in line With thefdelay'` explosive train. o

l. In acmbination fuse, a fuse casing formed With a cavity, a pl'ungerunit im# movably held in the cavity and including a percussion plunger and a guide member cooperating to limit their extensioinineans toi" releasably locking, the plunger and guide Yiii extended position, a delay explosive train eccentrically carriedby the plunger, an axially movable striker in thev fuse casing Lpassing through theplunger unit and a firing pin lixed iii the fuse casing and extending fuse, a fuse casingV YcentricallyVV carried the plunger ing through the guide in line With ythe, delay explosive train.

6. In a combinationv fuse, a fuse casing formed With a cavity, a plunger unit including a percussion plunger Yand a guide member' cooperating tolimit their extension, means for rele'asably locking'the plunger and guide in extended position, a delay explosive train eccentrically carried by the plunger, a striker in the fuse casing passing through tlieplunger unit and a firing pin fixed in the fuse casing and extending through the guide in line With the delay explosive train.

V7. In afcombination fuse, a fuse casing formed With a cavity, a plunger unit includ-A ing a percussion plunger and a guide meinber cooperating to limit their extension, meansfor releasably locking the plunger and guide in extended position,` a delay explosivetrain eccentrically carried by the plunger, a striker inthe fuse casing passing through the plunger unit and a liring pin fixed in the fuse casing in' line With'the delay explosive train. 8. In a combination tese, a casing, a plunger in the casing, means carried by and releas-V ably lockedto Ythe plunger and engaging the casing for restraining the plunger against movement, an independentlymovable striker passing through the plunger and an element of a firing mechanism carried by the plunger. 9. In a'fuse, a casing, a plunger in theV v casing, a restraining member engaging the and, an independently movable striker pass-` .ing through the restraining member and.

percussion. plunger and a guide, member co- Y operating to limit their relative extension and having a central passageto accommodate auxiliaryme'chanism, means for releasably locking said members in"extendedv position, and an element Vof a firing mechanism, ee-

eiiiennr Roanne; 

